90685216 has 24 divisors (see below), whose sum is σ = 179579484. Its totient is φ = 45077760.

The previous prime is 90685211. The next prime is 90685229. The reversal of 90685216 is 61258609.

It can be written as a sum of positive squares in 2 ways, for example, as 88736400 + 1948816 = 9420^2 + 1396^2 .

It is a super-3 number, since 3×90685216³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (90685211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2655 + ... + 13726.

Almost surely, 2^90685216 is an apocalyptic number.

It is an amenable number.

90685216 is a deficient number, since it is larger than the sum of its proper divisors (88894268).

90685216 is a wasteful number, since it uses less digits than its factorization.

90685216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16564 (or 16556 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 90685216 is about 9522.8785564030. The cubic root of 90685216 is about 449.2749079957.

The spelling of 90685216 in words is "ninety million, six hundred eighty-five thousand, two hundred sixteen".